computer became sluggish with all open applications not responding
Am curious to see what the outcome ws for the OP. I have the same error code on a Mid 2012 13" MacBook Air. System was running fine until yesterday when the computer became sluggish with all open applications not responding.
After repairing permissions in disk utility, the fans kicked in at around 6500rpm upon restart and have remained throughout with kernal_task running at about 300% of CPU.
I decided on reverting to a previous back-up, however abandoned this after the estimated time increased to 30hrs. Instead I opted for a clean install, however instead of installing Mavericks, it reverted me back to lion, an OS I have never purchased.
While the install was successful, the kernal_task is still running at 300% of CPU and thus making it unusable.
Is this a good question?
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3 Comments
Dave You should post your own Question (by all means link yours to this one). Given the fact you have a newer model I don't think your system should be as dusty or need new thermal paste let. - Did you buy your system new or used? By chance did you upgrade the OS and just forgot? It appears the recovery partition was setup with Lion which is why it reverted. - Your problem is more likely a known issue with this series, the SATA cable has gone bad. Apple & a few third parties got a bad run of cables which will cause your problem as the error rate is through the roof causing more retries causing the CPU and the HD to over work which then causes the high heat problem.
by Dan
In the meantime download Temperature Gauge Pro (or other good temperature & fan monitoring app, I happen to like this one) so you get a better perspective on what the different sensors & your fans are doing. Paste a screenshot so we can see it as well.
by Dan
Hi Dan, thanks for the response.
Weirdly, the kernel_task consuming all of the CPU dropped significantly (to around1.0%) shortly after posting, and the fans subsequently stopped. I have in the meantime, reverted back to an earlier backup running Mavericks 10.9.2.
In answer to your questions:
- I upgraded to Mavericks shortly after it's release (from Mountain Lion).
- All updates are automatic (including external software such as Adobe CC.)
- My system was purchased new in November 2012, however after only a few months the logic board was found to be faulty and replaced by Apple Japan.
- The system was running at 36C throughout, rising to a maximum of 40C (according to Temperature Gauge and iStat.)
by daveainley